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Our garden notes are full of exclamation marks describing the dense large flower heads of Hydrangea 'Gertrud Glahn' (Matthes, 1923) as they deepen from lavender blue to dazzling bright blue. The leaves are extra large.
Early summer to midsummer. 4 ft. x 4 ft.
Blue flowers
Part Shade Zones 5, 6, 7, 8, 9 |